Thermoelectric Performance of Tetrahedrite Synthesized by a Modified Polyol Process
Thermoelectric Performance of Tetrahedrite Synthesized by a Modified Polyol Process
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DOI：
10.1021/acs.chemmater.6b04950
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发表时间：
2017-02
影响因子：
8.6
通讯作者：
Daniel P. Weller;Daniel L. Stevens;Grace E. Kunkel;Andrew M. Ochs;Cameron F. Holder;D. Morelli;M. E. Anderson
中科院分区：
文献类型：
--
作者：
Daniel P. Weller;Daniel L. Stevens;Grace E. Kunkel;Andrew M. Ochs;Cameron F. Holder;D. Morelli;M. E. Anderson
采用快速、低能耗的改性多元醇法制备了由地球上丰富的元素组成的具有发展前途的热电材料--黝铜矿。已经证明了在220 °C下仅需要1小时就可以在克级上合成未掺杂和锌掺杂的黝铜矿样品。该方法能够掺入掺杂剂并产生50-200 nm尺寸范围的颗粒。为了测定体热电性能，通过放电等离子体烧结将通过该溶液相方法生产的粉末致密化成颗粒。在323 ~ 723 K的温度范围内得到了热电势、电阻率和热导率。最大ZT值在723 K被发现是0.66和1.09的未掺杂和锌掺杂的黝铜矿样品，分别。这些值与使用时间和能量密集的常规固态方法获得的值相当或更高。用这种溶液相法制备的纳米材料制成的固结颗粒，...
Tetrahedrite, a promising thermoelectric material composed of earth-abundant elements, has been fabricated utilizing the rapid and low energy modified polyol process. Synthesis has been demonstrated for undoped and zinc-doped tetrahedrite samples on the gram scale requiring only 1 h at 220 °C. This method is capable of incorporating dopants and producing particles in the 50–200 nm size regime. For determination of bulk thermoelectric properties, powders produced by this solution-phase method were densified into pellets by spark plasma sintering. Thermopower, electrical resistivity, and thermal conductivity were obtained for temperatures ranging from 323 to 723 K. Maximum ZT values at 723 K were found to be 0.66 and 1.09 for the undoped and zinc-doped tetrahedrite samples, respectively. These values are comparable to or greater than those obtained using time and energy intensive conventional solid-state methods. Consolidated pellets fabricated using nanomaterial produced by this solution-phase method were ...